Yarn winding



Dec. 12, 1944. c. L. HIVICK ET-AL YARN WINDING 3 Sheets-Sheet l I N 93 INJENT R5 A BY G L Mc LUCKIE 3M My W ATTORNEYS Filed Feb. 28, 1942 Dec. 12, 1944. c. L. HlVlCK ETAL 7 2,364,714

YARN WINDING 7 Filed Feb. 2a, 1942' s Sheets-Sheet 2 t Dec. 12, 1944. C vlc ETAL 2 ,364,714

YARN WINDING Filed Feb. 28, 1942 3 Sheets-Sheet 3 INVENTORS. C. L.HIV|CK. BY G-L.M LUCKIE.

ATTO R NEYS I detailed description Patented Dec. 12, 1944 YARN wnvnnvc Charles L. Hivick, Cre'saptown, and George L. McLuckie, Frostburg, Md., assignors to Celanese Corporation of America, a corporation of Delaware Application February 28, 1942, Serial N 0. 432,722

9 Claims.

This invention relates to the winding of yarn into packages, and relates more particularly to the production of improved yarn packages.

Ring twisters commonly employed for winding yarn packages, particularly those containing from one to two pounds of yarn, are equipped with traverse driving mechanisms which furnish a constant traverse stroke at all times. Due to variations in bobbin dimensions and tothe absence of means for adjusting individual spindles, poorly wound yarn packages are often obtained. It is accordingly an important object of this invention to provide a novel arrangement adapted to be attached to a ring twister which will cause to be produced yarn packages of improved characteristics.

Another object of this invention is the provision of a novel creeper gear arrangement adapted to be attached to a ring twister for controlling the traverse stroke in such a manner that the wind of the take-up bobbin is continuously varied.

A further object of this invention is to provide in a ring twisting device a novel arrangement for causing the ring rail thereof to modify its stroke when it reaches a predetermined position in relation to the yarnpackage being built, in i order to form taper-top yarn packages.

Other objects of this invention, together with certain details of construction and combina-' tions of parts will .appear'from the following and claims. Although this invention is applicable to the packaging of yarns of any natural or synthetic fibers or filaments, it is particularly eflective in the packaging of continuous filament yarns having a smooth surface which causes the same to have a-geater tendency to shift or slide each other when in package form. This invention may be applied to. any winding device employing a traverse bar carrying a ring for directing the yarn on to a take-up package, examples. of such devices being ring twisters where yarn is pulled from a supply package and wound, with or without adding on to a bobbin, and ring spinning machines where artificial filaments are formed by extruding a spinning solution through a plurality of suitable jets into a setti \g medium and then grouping the filaments formed into a yarn and winding said yarn on to a take-up spool or bobbin with theaid of a ring and traveler.

-In the drawings, .where this invention is shown applied to a ring twisten.

Figure 1 is a front elevational view of a ring twister device modified in accordance with this invention,

Figure 2 is a side elevational view taken along line 22 of Figure 1 in the direction of the arrows,

Figure 3 is a crosssectional view taken on line 3-3 of Figure 2 in the direction of the arrows but on a slightly enlarged scale,

Figure 4 is an elevational view of a yarn package produced in accordance with this invention, I

Figure 5 is a view showing graphically the build and internal structure of the yarn package produced in accordance with this invention.

Like reference numerals indicate like parts throughout the several views of the drawings.

Referring to the drawings, reference numeral I is applied'to the main horizontal frame bar of a ring twisting, machine. This bar extends across the front of the machine and is suitably supported with legs, braces, end pieces, etc. that are not shown on the drawings as their exact structure is not necessary to an understanding of the invention. Mounted along the bar I are wells Zadapted to journal and lubricate spindle and whorl assemblies generally indicated by reference numeral 3 that carry the bobbins 4 upon which the yarn is wound. Also mounted on the bar I is a whorl brake and locking lever 5. Means are provided for imparting rotation to the spindle and whorl assemblies 3, said means comprises a main drive shaft 6, suitably journaled in the main frame (not shown) of the ring twisting machine, and a drive pulley'l fixed to said shaft, the pulley! being operatively connected to the spindle and whorl assemblies by meansof a belt Q which travels over a guide roller 9, as is well understood in the art.

At intervals in the bar I are guide-ways I I in which supporting posts I! are adapted to reciprocate. The posts I2 support a traverse bar -I3 in which are mounted rings II carrying a traveler (not shown) for twist in theyarn and for directing the yarn on to the bobbin 4. The posts. I2 may be provided with a wear plate I5 that rests on or is fastened to a roller I6 mounted on a lever arm I! provided at its op-' posite end with a counterweight ll. At least one of the lever arms I! .has suitably attached thereto at a point intermediate its ends an arm I9, thepurpose of .which will hereinafter be described. The lever arm 11 is 'journaled on a shaft 2| suitably supported on the main frame. Ordinarily there are twenty-four such counter- Weighted lever arms I! on each -spindle ring inches, or

twisting machine, the counterweights [8 being 50' pounds each. In. the reciprocation of the traverse bar [3, the raising thereof is effected by the counterweighted lever arms, while the lowering of the:- same is accomplished by a posi- -tively driven heart-shaped cam 22. The cam 22, which is mounted for rotation on a shaft 23 driven from a. gear box 24 operated by the main. drive of the machine, cooperates with a cam follower 25 rotatably mounted in a recess 26% which is adapted to continuously vary the wind on. the take-up bobbin. by a step-by-step change in the stroke eflfected by the usual builder arm- For instance, on prior standard set-ups the traverse stroke was constant and was set to travel the full length of the bobbin barrel, norany desired length of creep, Also, the collars 35 and 3.6 may be spaced to throw the ratchet wheel. 42. the distance of one or more teeth tovary the speed of the traverse creep. It. has been found, for example, that a. 8% inch package formed by having the builder arm. move the traverse. 8 inches while the creeper gear provides a inch creep of the traverse.

The creeper g'ear arrangement described above may be incorporated in any ring twisting machine producing type of. package. It is. however, especially advantageous when incorporated in a ring twisting machine employed in producing a taper-top package- In accordance with our invention a taper-top package may be produced by incorporating in. the traverse drive mechanism an eccentric: idler pulley attachment. The object of this pulley isto cause the ring bar to accelerate its stroke when it rises to a. premally about 8%; inches, whereas in'the present Y case where a creeper gear attachment is employed, the constant stroke is set to travel 8% of an inch shorter than the bobbin barrel, with the superimposed stroke effected by the creeper gear making up the difierence of the of an'inch. Consequently, slight variations'in bobbin traverse length do not show up when the wind broken up at either end of the stroke. A further advantage is obtained in that the slight continual variation in pitch of the traverse produces a. more firm package.

The creeper gear attachment 30. mounted on the shaft 29 at" the end of the builder arm ll will now be described in detail, On the shaft 29 is mounted a bushing 3| which supports a pivoted ratchet arm 32 having a counterweight 337 fixed at one end and a rod 3lrpivotally attached to the other end. The rod 34 is pro vided with two adjustable collars 35 and 36' so spaced as to be on opposite sides of an abutment plate 3'! through which the rod 3 passes. The

abutment plate 31 is attached to the main frame I in a suitable manneras indicated at 33. The collars 35 and 3G acting against the abutment plate 31 eifect a movement of the ratchet arm 32 relative to the builder arm 21. Mounted on the ratchet arm 32 is a pawl 39 held by a spring against a ratchet wheel 42- The hub of the ratchet wheel 42 extends laterally of the shailt 29 and is formed into an eccentric bearing 43 on which is journaled a hub ll; having an integral extension or ear 5 to which the traverse drive chain I6 is attached.

In operation, the builder arm 21 is reciprocated by the cam 22 in a constant are thus imparting a pull and release of a definite length or set on the traverse drive chain 5. This motion normally would produce a constant repeat of the traverse of the yarn on the package, the pitch of the traverse on any portion of the package being constant and governed by the shape ofthe cam 22- However, superimposed upon this constant movement by the cam 22 is the continual variation in a stepby step advance and return of the set of the traverse efiected by the ratchet wheeKZ and eccentric bearing l3 combined to producer. creeper gear." Obviously the eccentric can be madeto have any suitable ratio between its major-and minor axes to produ e determined position in relation to the package being built, and cause the ring bar to be deaccelerated on its downward stroke.

Means are provided for tapering the top portiorr only of the package.v This. means consists of an eccentric idler pulley for guiding the traverse lifting chain, thus making; for a. simple and inexpensive method. of, producing taper-top packages 5 inches straight traverse and 3 /1 inches taper traverse) for the purpose of increasing yarn capacity on bobbin and allowing additional finger clearance between the outer periphery of the bobbin flange and the yarn windings, thereby. minimizing the danger of opera.- tives soiling outer when handling lull packages. celerate the ring rail when it rises to a predetermined position in relation. to the package being built, the stroke being deaccelerated on its downward stroke. motion is accomplished by modifying the normal builder chain and pulley construction. The means provided herein for forming the taper-top packages changes the ratio of the pulley so as to cause the chains connected thereto to be taken and let out in an accelerated and deaccelerated manner until they reach a predetermined position on the pul- Ieys, when they will act in the normal way. This complete motion is carried out with every revolution of cam 22 above described.

More specifically, the mechanism for producing the taper-top packages is interposed between the builder arm 21 and-the lever arm [I and includes an arrangement of idler pulleys. An idler pulley 41' is suitably journaled at 63 in a bracket 43 attached to the mainframe I. The

traverse drive chain 16 passes over the idler pulley U and is attached to an idler pulley 5! that is formed integral with or is attached concentrically to an idler pulley 52 that has a radial projection 53, extending therefrom. to the end of which a traverse builder chain 51 is attached. The other end of the chain H is attached to the working arm is of the lever [1. A fiat spot- 55 is machined on the periphery of idler pulley 5!. The flat spot; 55 on pulley 5i andthe projectioni3 on the pulley 52 change the ratio of the movement 'of the chains (6 and it causing them to accelerate and deaccelerate during a part of their movement and to operate at a'constant ratio the rest of their movement in each cycle This complete cycle or set of me- The purpose of said means is to actions is carried out at every revolution of the cam 22. v

The above described traverse drive produces a. package like that shown in solid lines in Figure which gets thinner as the 4. Inbuildingtbispeckagetbetraverseofyam on the package is substantially uniform on the up and down stroke over the section A but inpreierably about $55,

IIQ) o l-I'! of the entire length of the tion Cisfilledwithyarndmtothecreepofthe traverse eil'ected through the eccentric M. The package shown in dottedlinesinFigure Qisthe normal build of packages which compared with the package shown in solid lines defines a zone Dshowingtheextentoitlmincreaseinammmt ofyarnthatmaybeplacedonthepackageand this increased weight of yarn is placed on the package while building a package that has 40% less breakages in ubsequent con'mg operations and greatly reduced waste yarn due to the additional clearance at the of the bobbin- It is to be noted that in forming section A that chains It and ii are working against the normal face of the pulleys ii and 52', while in forming section B the reduced periphery of pulley due to the flat spot 55 thereon while chain 51 is working in a greater are than the normal periphery of pulley 52 due to the projection 53 thereon. Obviously section B can be made any suitable length relative to section A by varying the length of the flat spot 55 and/or the length of the projection 53; In practice it is found desirable to have section A about twice the length of section B, In longer, thinner packages Figure 5 illustrates graphically the build and internal structure of the yarn package, showing the position of the traverse rail with respect to the yarn package stroke of said traverse rail. It will be noted that the yarn is applied at a uniform pitch while the traverse rail moves the distance A indicated by straight line 56. Thus, the speed of revolution of the package will determine the number of turns of yarn applied. It is obvious. therefore, that under all speeds of revolution of I the package the building of the package over this section A will produce a cylinder of yarn of 1miform thickness. The curved line 51 indicates that the traverse rail accelerates over the dis- C,whilethecurvedline58indown-stroke over the distance B minus C. Thus, thebuild onthisporfionofthepackagewillbe inthenature ofafrustrumofaconethewallof top of the package is approached.

The reference numeral 6| indicates the upper extremity of one stroke of the traverse rail, the reference numeral 62 indicates the upper extremity of another stroke of the traverse rail, and the reference numeral 63 indicates the uppermost point which is reached by the traverse rail. These diflerences in upper extremities of the strokes are efl'ected by a step-'by-step creep of the traverse rail, the reference numeral 4 indicating a return of the stroke during the stepby-step creep. This to hundreds of times in building a package. the number depending upon the type of yarn and the purpose for which the package is being built. In building a 1 /2 pound package of 150 denier artificial yarn the traverse rail will make thousands of complete strokes and the step-by-step P kage. The sec-,

chain 45 is working against this ratio may be increased.

at any fime during the cycle is repeated from ten creep cycle will be repeated a much smaller number of times.

It is to be understood that the foregoing detailed description and drawings are given mere- 5 1y by way of illustration and that many variations may be made therein without departing from the spirit of our invention.

Having described our invention, what we desire to secure by Letters Patent is:

I- A method of forming a package of yarn on a bobbin or spool by ring spinning, which comprises traversing the yarn at a constant pitch over a body section, traversing the yarn at a constantly increasing pitch over. a taper section, said body section plus said taper section being the. length but not the full length of the spool or bobbin, traversing the yarn at a constantly decreasing pitch back over the said taper section, traversing the yarn at a constant pitch back pver the body section to constitute a complete cycle, moving the traverse n increment of the diiierence between the length of a com- I plete cycle and the length of the spool 01: and windinganother cycle.

2 In a device for winding bobbins and the the combination with a ring device having a traverse bar and a ring for directing yam on m e bobbin, a builder for motion to said traverse bar and a constant mov- 3 v ing drive for oscillating said builder am of means. including an idler pulley having a flat face thereon, for accelerating and de-accelerating the motion of said traverse bar, imparted thereto through said builder arm by said constant drive, as the yarn is applied to a. section at one end of said bobbin, and means for continuously varying the windon said bobbin by a. step-by-step motion relative to the package being formed, said wind-varying means comprising a creeper gear arrangement mounted on said builder arm and including an eccentric bearing operatively connected to said idler pulley.

3. In a. device for winding bobbins and the like,

the combination a ring twisting device hav ing a traverse bar and a ring for directing yarn on to the bobbin, a builder arm for imparfing motion to said traverse bar and a constant moving drive for oscillating said builder arm, of means, including an idler pulley having a flat face'thereon, for accelerating and tie-acceleratingthe motion of said traverse bar, imparted thereto through said builderarm'by said constant drive, as the yarn is applied to a section at one end of said bobbin, and means for continuously varying the wind on said bobbin-by a step-by-step motion relative to the package being formed, said wind-varying means comprising a ratchet wheel mounted on said builder arm, a hub integral with said ratchet wheel and form-- ing an eccentric bearing, a. second hub integral with said eccentric bearing, means operatively connecting said second hub with said idler pulley, and means for rotating said ratchet wheel .upon movement of said builder arm.

4. In a device for winding bobbins and the like, the combination with a ring twisting device having a traverse bar and a ring for directing yarn von to the bobbin, a builder arm for imparting motion to said traverse bar and a, constant moving drive for oscillating said builder arm, of means, including an idler pulley having a flat face thereon. for accelerating and de-accelerating the motion of said traverse bar, imparted thereto through said builder arm by said constant drive, as the yarn is applied to a section at bobbin lay-step motion hub integral with ratchet wheel continuously varying one end or said bobbin, and means for continuonsly varying the wind on said bobbinby a. steprelaiive to the e bang wmd' wane Vmeanscomp' nsm ga. mounted on said lmilder arm, a

formed, said ratchet wheel and means includ'mg a ratchet am having a. pawl thereon for running said ratchet wheel upon movementoi said builder arm.

5. In a device ior winding bobbins and the like, the combination Wifll a ring irzvisfmg deviee having a la-averse Thar and a, ringior ingyarnontothebobbinahuilderam for imparting motion (ho said traverse bar and a constant moving drive for oscmarling said builder am of means, an idler having a hat face thereon, for accelerating the molion of said traverse bar, imparted thereto through said builder arm by said constant drive, as ihe yarn. is applied to asecfinnaianeendnfsaifibobhmandmeansim the wind on said bobbin by a. step-by-step motion relative to the .package being ionized, said wind-vary n means comprising a ratchet wheel mounted on said-builderam,ahubintegralwiihsaidraichetwheel andinnninganeccemrichearing, asecondhub accelerating and de- I said constant drive, as

integralwifli'saideccenizicbearingmeansw' idler pulley, and means including a counterweighied'raiachetamhavhagaspringpawl thereon for said upontoisaidbuilderam dlnadeviceior mid constant drive, as

ing an eccentric bearing, a. with said eccentric bearing, means operative]! connecting said second hub with said idler pulley, and means for rotating said ratchetwheel upon movement of said builder arm, said latter means including a. ratchet arm pivotally mounted on said ratchet wheel shaft, a. pawl onsaid ratchetarm for cooperating with said ratchet wheel and a colmterweight carried by said ratchet arm.

winding bobbins and the like, the combination with a ring twisting device having a. traverse bar and a ring for directing yarn on to the bobbin, a builder armfor to saidtmverse bar and a. H constant moving drive for'oscil lating said'build er arm, of means, includingi an' idler, pulley hav imparting -motion ratchet wheel iug a flat face thereon, for accelerating and deaccelerating the motion of said traverse bar, imparted thereto through said builder arm by the yarn is applied to a mid bobbin, and means for continuously varying the wind on said bobby a, step-hy-step motion relative to the package being formed, said wind-varying means comprising a carried free end of saidlbuilder a ratchet wheel on said shed-i, a. hub integral said ratchet wheel and dorm ing an eccentric hearing, a secondl'nzb integral "with said eccentric hearing, means operatively connecting said second lmb said idler pu1- ley, and means ior rotaiing said ratchet wheel upon movemenboi" said builder arm, said latter means including a ratchet am pivotally mounted :on said ratchet wheel sheila, a on said ratchet arm for cooperafing' wheel, a, counterweight at one end or said ratchet am a. rod on the other end of said ratchet arm, and an abutment plate on the ring twisting device for the movement of said rod whereby said rod causes the rotaiion of said ratchet wheel through said ratchet arm and pawlcanied thereby. 8. In a device for winding bobbins and idle like, the combination with a. ring twister device having. a. traverse ha: and a. ring for directing yarn on to the bobbin, a builder aim for imparling motion to s d traverse bar, and a constant moving drive ior oscillafin said builder arm, and means for accelerating and de-acceleraiing the motion oi mid. traverse bar as-the sectionatoneendoisaid' mmn e an idler pu er flat race a. second idler pulley joined to said first-meniioned idler pulleyganzeans aereepergeararrangement including an eccentric bearing opera- 1 lively cormected to one of saididler pulleys for ously m ths wind on said bobbin by a step-by-step molion relaiive to the package formed, and means ior'operaiively connectlng the other of said idler pulleys to the traverse haroperaizing means. '9.Inadeviceiorwindingbobbinsandthe like, the combination with a ring twister device having-a. traverse bar d a ring for directing yarn on to the bobbin, a builder am for imseciion at one end of havinga parting motion to said traverse bar, anda con stant moving drive for oscillating said builder arm, and means for accelerating and de-accel eraliug the motion of said navel-so bar as the yarn is'applied to a section atone end of said bobhim said means comprising an idler pulley a. flat face thereon, a second idler pulley having 'a projection thereon and 'operatively joined to said first-mentioned idler pulley and means comp a. creeper gear arrangement bearing operaiively coni nected to said flatiaced idler pulleyfor co'ntinuously varying the stp-by-step motionrelative lad-the package being formed, and means for operatively connecting the projection on the other of said idler pulleysto the traverse bar operating means.

: iGuonGn LJ McLUCmE;

saidratchei; V

ama-in; 1

wind on said bobbin by a. 

